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clone: request the 'bundle-uri' command when available

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Set up all the needed client parts of the 'bundle-uri' protocol v2
command, without actually doing anything with the bundle URIs.

If the server says it supports 'bundle-uri' teach Git to issue the
'bundle-uri' command after the 'ls-refs' during 'git clone'. The
returned key=value pairs are passed to the bundle list code which is
tested using a different ingest mechanism in t5750-bundle-uri-parse.sh.

At this point, Git does nothing with that bundle list. It will not
download any of the bundles. That will come in a later change after
these protocol bits are finalized.

The no-op client is initially used only by 'git clone' to test the basic
functionality, and eventually will bootstrap the initial download of Git
objects during a fresh clone. The bundle URI client will not be
integrated into other fetches until a mechanism is created to select a
subset of bundles for download.

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Derrick Stolee <derrickstolee@github.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Ævar Arnfjörð Bjarmason
2022-12-22 15:14:09 +00:00
committed by Junio C Hamano
parent 8f788eb8b7
commit 0cfde740f0
8 changed files with 164 additions and 0 deletions
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44
connect.c
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@@ -15,6 +15,7 @@
#include "version.h"
#include "protocol.h"
#include "alias.h"
#include "bundle-uri.h"
static char *server_capabilities_v1;
static struct strvec server_capabilities_v2 = STRVEC_INIT;
@@ -491,6 +492,49 @@ static void send_capabilities(int fd_out, struct packet_reader *reader)
}
}
int get_remote_bundle_uri(int fd_out, struct packet_reader *reader,
struct bundle_list *bundles, int stateless_rpc)
{
int line_nr = 1;
/* Assert bundle-uri support */
server_supports_v2("bundle-uri", 1);
/* (Re-)send capabilities */
send_capabilities(fd_out, reader);
/* Send command */
packet_write_fmt(fd_out, "command=bundle-uri\n");
packet_delim(fd_out);
packet_flush(fd_out);
/* Process response from server */
while (packet_reader_read(reader) == PACKET_READ_NORMAL) {
const char *line = reader->line;
line_nr++;
if (!bundle_uri_parse_line(bundles, line))
continue;
return error(_("error on bundle-uri response line %d: %s"),
line_nr, line);
}
if (reader->status != PACKET_READ_FLUSH)
return error(_("expected flush after bundle-uri listing"));
/*
* Might die(), but obscure enough that that's OK, e.g. in
* serve.c we'll call BUG() on its equivalent (the
* PACKET_READ_RESPONSE_END check).
*/
check_stateless_delimiter(stateless_rpc, reader,
_("expected response end packet after ref listing"));
return 0;
}
struct ref **get_remote_refs(int fd_out, struct packet_reader *reader,
struct ref **list, int for_push,
struct transport_ls_refs_options *transport_options,